@height:100px;
@width:100px;
@bg:blue;
#box2{
  height: @height;
  width: @width;
  //background: @bg;
  display: flex;
  backface-visibility: hidden;
  background: url("../imgs/4.jpg") no-repeat 100%;
}
/**
#box2{
  height: @height;
  width: @width;
  background: @bg;
  display: flex;
  backface-visibility: hidden;
}
 */